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Elementary Geometry for College Students
In the figure with regular pentagon $A B C D E,$ do $\overrightarrow{B E}$ and $\overrightarrow{B D}$ trisect $\angle A B C ?$
$(H I N T: \mathrm{m} \angle A B E=\mathrm{m} \angle A E B$
(GRAPH CANT COPY)